Ionia Weather Forecast

    • 20
    • 29

    Slight Chance Snow Showers

    • 11
    • 31

    Snow Showers Likely

    • 13
    • 20

    Chance Snow Showers

    • 17
    • 25

    Chance Snow Showers

    • 23
    • 30

    Mostly Cloudy

    • 33
    • 39

    Mostly Cloudy

Today 12 Dec Ontario

Partly to mostly sunny. Highs Ranging from the mid 20s on the Hilltops to around 30 across the lower Elevations. West Winds 10 to 15 Mph.

Tonight 12 Dec Ontario

Partly to mostly cloudy. Lows 15 to 20. Southwest Winds 5 to 10 Mph, becoming south.

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Ionia Temperature Statistics

December Temperature

Rochester, Greater Rochester International Airport (15.5 miles)

  • Lowest 8 December, 2025

    3.9 °F

  • Average December

    23.8 °F

  • Highest 3 December, 2025

    34 °F

Climate (2020–Present)

Rochester, Greater Rochester International Airport (15.5 miles)

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  • Average Low 2020–2025

    42.5 °F

  • Average 2020–2025

    50.9 °F

  • Average High 2020–2025

    59.5 °F
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